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hdgarrood/gist:f9c351a218ec5e911c6a

Created July 7, 2015 17:41
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gistfile1.txt
> let f c = if c then Nothing else Just false
> let x = Just true
> let y = Just false
> (x <|> y) >>= f
Nothing
> (x >>= f) <|> (y >>= f)
Just (false)
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